Finding the Fourth Proportional to 117,632, 162,332.16 and 64,640

Step by Step Solution

1. Step 1: Write the proportion equation
   117,632 : 162,332.16 = 64,640 : x
2. Step 2: Convert to fraction form
   117,632/162,332.16 = 64,640/x
3. Step 3: Cross multiply
   117,632x = 162,332.16 × 64,640
4. Step 4: Simplify right side
   117,632x = 10,493,150,822.40
5. Step 5: Solve for x
   x = 10,493,150,822.40/117,632
6. Step 6: Final answer
   x = 89,203.20